The X01 Deep Vault isn't just a quick keycard run. Your squad needs enough firepower to hold a control room, then enough supplies to get back out. If you're planning a run with MW4 Bot Lobbies, start by packing spare armor plates, ammunition, healing supplies, and something for close-range fights. Once the outer door opens, take the central elevator down and find the escape elevator before heading to Floor 4. The panel in the control room starts a separate defense for the Core Room. Expect armored enemies and riot shields, so don't spend every last round before the job's done.

Finding The Captain

You'll need the Deep Vault 301 keycard before any of that. Enter X01 through the facility northwest of Hajin, north of the 14th Political Prison. There's no vault keycard requirement at the facility entrance. Once you're inside, look for The Captain's map icon. He moves around, so check the Admin Offices and T.E.C.H. Lab, then try the Main Warehouse if he isn't there. His armor and minigun make an open fight rough. Use cover, fire together, and throw Shock Sticks to interrupt him. Pick up the card after the fight and use a Secure Slot if you've got one. Check your inventory after using it; don't assume every interaction leaves the card untouched.

What to Open and When to Leave

The large vault door sits on X01's lower floor, north of the Medical Wing. Use the 301 card at its keypad, wait for the door to open, and head down. After your squad completes the Floor 4 defense, the Core Room is on Floor 1. There are weapon lockers and Argonaut Armor inside, but the DRC locker needs its own X01 Vault DRC Locker Key. Other numbered rooms need matching keys, too. Lieutenant Blix may appear, so keep some ammunition in reserve. Once the Core Room opens, power cuts and radiation builds. Don't linger over every container: force open the southeast escape elevator and climb its shaft.

Plan the Extraction

Getting out of the vault doesn't end the deployment. Your squad still needs an active X01 extraction point. A Staff Emergency Exfil Keycard can be used at an Emergency Egress shaft, or you can use the final exfil lift when it's available. Before going in, agree on who's watching the approach, who's handling the panel, and which route you'll take afterward. The supplied update notes say UAVs and Advanced UAVs were disabled in X01, so listen for movement and keep talking to your teammates instead. If you're considering Bot Lobbies MW4 for another run, restock first and make sure everyone's ready to move together.